Free & open data APIs

One API key.
Dozens of open data sources.

Weather, currency & crypto rates, countries & public holidays, space and nature data, books, food/nutrition, TV shows, Wikipedia, music and trivia — all through one clean, consistent JSON API. Built on the best free open-data sources on the internet, so you don't have to hunt for or juggle a dozen different providers yourself.

Get a free API key Browse the docs
Bitcoin (live)
EUR / USD
London, right now
ISS altitude
Aircraft tracked

Eleven categories, one key

Every endpoint below uses the same API key, the same rate-limit headers and the same clean JSON shape — so switching categories doesn't mean learning a new API.

See it all live in Live Demos — no API key required

Weather & Environment

Live conditions, multi-day forecasts and air quality for any coordinates on Earth.

  • GET /api/v1/weather/current
  • GET /api/v1/weather/forecast
  • GET /api/v1/weather/air-quality
  • GET /api/v1/weather/geocode
Explore the free weather API

Finance & Crypto

Foreign-exchange rates, currency conversion and live cryptocurrency prices.

  • GET /api/v1/finance/exchange-rates
  • GET /api/v1/finance/convert
  • GET /api/v1/finance/crypto/prices
Explore the free finance API

Geography & Reference

Country data, public holidays for 100+ countries, and IP address geolocation.

  • GET /api/v1/geography/countries
  • GET /api/v1/geography/holidays
  • GET /api/v1/geography/ip-lookup
Explore the free geography API

Space, Nature & Misc

Real-time ISS position, sunrise/sunset times, recent earthquakes and random quotes.

  • GET /api/v1/space/iss-location
  • GET /api/v1/space/sunrise-sunset
  • GET /api/v1/nature/earthquakes
  • GET /api/v1/misc/quote
Explore the free space API

Books & Culture

Search millions of books and look up full details by ISBN, courtesy of Open Library.

  • GET /api/v1/books/search
  • GET /api/v1/books/isbn/{isbn}
Explore the free books API

Food & Nutrition

Barcode lookups with nutrition facts, ingredients, allergens and Nutri-Score.

  • GET /api/v1/food/product/{barcode}
  • GET /api/v1/food/search
Explore the free food API

Entertainment

Search TV shows and pull full details, cast and ratings, courtesy of TVMaze.

  • GET /api/v1/entertainment/shows/search
  • GET /api/v1/entertainment/shows/{id}
Explore the free entertainment API

Knowledge & Reference

Article summaries and full-text search across Wikipedia.

  • GET /api/v1/knowledge/wikipedia/summary
  • GET /api/v1/knowledge/wikipedia/search
Explore the free knowledge API

Music

Search artists and album releases from MusicBrainz's open music encyclopedia.

  • GET /api/v1/music/artists/search
  • GET /api/v1/music/releases/search
Explore the free music API

Trivia & Games

Multiple-choice or true/false trivia questions across dozens of categories.

  • GET /api/v1/games/trivia
  • GET /api/v1/games/trivia/categories
Explore the free games API

Shipping & Maritime

Live AIS vessel positions, offshore drilling rig status and navigational warnings.

  • GET /api/v1/shipping/vessels/live
  • GET /api/v1/shipping/warnings
Explore the free shipping API

Why developers use FreeOpenAPI.dev

Free, open APIs are scattered across the internet — different auth schemes, different rate limits, different response shapes. FreeOpenAPI.dev wraps the best free open-data providers behind one API key and one consistent JSON style, so you can prototype an idea, power a hobby project, or feed a dashboard without signing up for ten different services first.

Students & learners Real data for coursework and portfolio projects, free to start.
Hobbyists & makers Home automation, Raspberry Pi dashboards, weather displays.
Indie hackers Ship an MVP fast without stitching together ten SDKs.
Get your free API key See all endpoints
Built on trustworthy, well-known open data

Every endpoint is backed by an established, free, publicly documented data source (Open-Meteo, Frankfurter/ECB, CoinGecko, country data, Nager.Date, ip-api.com, Where The ISS At, sunrise-sunset.org, USGS and DummyJSON). We reshape their responses into one consistent format and add key-based auth, rate limiting and caching on top — see Data sources for full attribution.

Frequently asked questions

Is FreeOpenAPI.dev really free?

Yes. The free tier includes 100 requests per day across every endpoint and only requires a verified email address — no credit card. Pro (1,000/day) and Business (20,000/day) tiers are available as monthly subscriptions for heavier use.

How do I get an API key?

Enter your email address on the Docs page, click the confirmation link we send you, and your key works immediately. One key per email address.

Which APIs are included?

Weather and air quality, exchange rates and crypto prices, country data, public holidays, IP geolocation, live ISS position, worldwide flight tracking, earthquakes, species sightings, books, food and nutrition by barcode, cocktails, TV shows, Wikipedia, dictionary definitions, universities, music metadata and trivia questions — all documented on the Explore page.

Do I need a separate key per data source?

No — that's the point. One key authenticates every endpoint, with the same JSON conventions and the same X-RateLimit-* headers everywhere.

What happens if an upstream data source goes down?

The API caches responses and, for volatile data like crypto prices, serves the last known-good value marked as stale rather than failing your request. A live status table of every upstream source is on the About page.

Can I use the data commercially?

Yes, subject to the licenses of the underlying open-data providers — most are fully open. See the attribution table on the About page for each source's terms.